Commitments and Contingencies	9 Months Ended
Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies To meet the financing needs of its customers, BancShares and its subsidiaries have financial instruments with off-balance sheet risk. These financial instruments include commitments to extend credit, standby letters of credit, and recourse obligations on mortgage loans sold. These instruments involve elements of credit, interest rate or liquidity risk. Commitments to extend credit are legally binding agreements to lend to customers. Commitments generally have fixed expiration dates or other termination clauses and may require payment of fees. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future liquidity requirements. Established credit standards control the credit risk exposure associated with these commitments. In some cases, BancShares requires that collateral be pledged to secure the commitment, including cash deposits, securities and other assets. At September 30, 2012, BancShares had unused commitments totaling $5,677,233 compared to $5,636,942 at December 31, 2011 and $5,890,227 at September 30, 2011. Standby letters of credit are commitments guaranteeing performance of a customer to a third party. Those guarantees are issued primarily to support public and private borrowing arrangements. To minimize its exposure, BancShares’ credit policies govern the issuance of standby letters of credit. At September 30, 2012, December 31, 2011, and September 30, 2011, BancShares had standby letters of credit amounting to $62,214, $57,446 and $57,933, respectively. The credit risk related to the issuance of these letters of credit is essentially the same as that involved in extending loans to clients and, therefore, these letters of credit are collateralized when necessary. Residential mortgage loans are sold with standard representations and warranties relating to documentation and underwriting requirements for the loans. If deficiencies are discovered at any point in the life of the loan, the investor may require BancShares to repurchase the loan. As of September 30, 2012, other liabilities included a reserve of $3,250 for estimated losses arising from the repurchase of loans under these provisions. In addition to standard representations and warranties, residential mortgage loans sold with limited recourse liability represent guarantees to repurchase the loans or repay a portion of the sale proceeds in the event of nonperformance by the borrower. The recourse period is generally 120 days or fewer. At September 30, 2012, December 31, 2011, and September 30, 2011, BancShares has sold loans of approximately $195,515, $207,963 and $216,950, respectively, for which the recourse period had not yet elapsed. Of these loans at September 30, 2012, $108,110 represent loans that would require repurchase in the event of nonperformance by the borrower. Any loans that are repurchased under the recourse obligation will carry the same credit risk as mortgage loans originated by the company and will be collateralized in the same manner. BancShares and various subsidiaries have been named as defendants in legal actions arising from their normal business activities in which damages in various amounts are claimed. BancShares is also exposed to litigation risk relating to the prior business activities of banks from which assets were acquired and liabilities assumed in the various FDIC-assisted transactions. Although the amount of any ultimate liability with respect to such matters cannot be determined, in the opinion of management, any such liability will not have a material effect on BancShares’ consolidated financial statements. During February 2011, United Western Bank, United Western’s parent company, United Western Bancorp, and five of their directors filed a complaint in the United States District Court for the District of Columbia against the FDIC, the OTS and others, claiming that the seizure of United Western by the OTS and the subsequent appointment of the FDIC as receiver was illegal. The complaint requested the court to direct the OTS to remove the FDIC as receiver, return control of United Western to the plaintiffs, reimburse the plaintiffs for their costs and attorney fees, and to award plaintiffs other relief as may be just and equitable. Neither BancShares nor FCB was named in the complaint. The defendants filed motions to dismiss all claims against them and, during June 2011, the Court dismissed all claims by the holding company and the individual directors, and it dismissed United Western Bank’s claim against the FDIC. However, the Court denied the motion to dismiss United Western Bank’s claim against the OTS, which permits that claim to proceed. It is unclear what impact, if any, the litigation will have on FCB or the assets acquired in the United Western transaction. During March 2012, FCB received communications from the US Small Business Administration (SBA) asserting that the SBA is entitled to receive a share of amounts paid or to be paid by the FDIC to FCB relating to certain specific SBA-guaranteed loans pursuant to the loss share agreement between FCB and the FDIC applicable to Temecula Valley Bank. FCB disputes the validity of the SBA claims and is pursuing administrative relief through the SBA. FCB is unable to determine the outcome or range of loss, if any, related to these claims. FCB previously reported that it had identified issues in its compliance with certain Treasury Regulations governing the provision of information returns to customers relating to debt presumed to have been forgiven for tax purposes. FCB has resolved the matter with the Internal Revenue Service. The resolution did not involve any payment to the IRS.

Commitments and Contingencies

To meet the financing needs of its customers, BancShares and its subsidiaries have financial instruments with off-balance sheet risk. These financial instruments include commitments to extend credit, standby letters of credit, and recourse obligations on mortgage loans sold. These instruments involve elements of credit, interest rate or liquidity risk.

Commitments to extend credit are legally binding agreements to lend to customers. Commitments generally have fixed expiration dates or other termination clauses and may require payment of fees. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future liquidity requirements. Established credit standards control the credit risk exposure associated with these commitments. In some cases, BancShares requires that collateral be pledged to secure the commitment, including cash deposits, securities and other assets. At September 30, 2012, BancShares had unused commitments totaling $5,677,233 compared to $5,636,942 at December 31, 2011 and $5,890,227 at September 30, 2011.

Standby letters of credit are commitments guaranteeing performance of a customer to a third party. Those guarantees are issued primarily to support public and private borrowing arrangements. To minimize its exposure, BancShares’ credit policies govern the issuance of standby letters of credit. At September 30, 2012, December 31, 2011, and September 30, 2011, BancShares had standby letters of credit amounting to $62,214, $57,446 and $57,933, respectively. The credit risk related to the issuance of these letters of credit is essentially the same as that involved in extending loans to clients and, therefore, these letters of credit are collateralized when necessary.

Residential mortgage loans are sold with standard representations and warranties relating to documentation and underwriting requirements for the loans. If deficiencies are discovered at any point in the life of the loan, the investor may require BancShares to repurchase the loan. As of September 30, 2012, other liabilities included a reserve of $3,250 for estimated losses arising from the repurchase of loans under these provisions.

In addition to standard representations and warranties, residential mortgage loans sold with limited recourse liability represent guarantees to repurchase the loans or repay a portion of the sale proceeds in the event of nonperformance by the borrower. The recourse period is generally 120 days or fewer. At September 30, 2012, December 31, 2011, and September 30, 2011, BancShares has sold loans of approximately $195,515, $207,963 and $216,950, respectively, for which the recourse period had not yet elapsed. Of these loans at September 30, 2012, $108,110 represent loans that would require repurchase in the event of nonperformance by the borrower. Any loans that are repurchased under the recourse obligation will carry the same credit risk as mortgage loans originated by the company and will be collateralized in the same manner.

BancShares and various subsidiaries have been named as defendants in legal actions arising from their normal business activities in which damages in various amounts are claimed. BancShares is also exposed to litigation risk relating to the prior business activities of banks from which assets were acquired and liabilities assumed in the various FDIC-assisted transactions. Although the amount of any ultimate liability with respect to such matters cannot be determined, in the opinion of management, any such liability will not have a material effect on BancShares’ consolidated financial statements.

During February 2011, United Western Bank, United Western’s parent company, United Western Bancorp, and five of their directors filed a complaint in the United States District Court for the District of Columbia against the FDIC, the OTS and others, claiming that the seizure of United Western by the OTS and the subsequent appointment of the FDIC as receiver was illegal. The complaint requested the court to direct the OTS to remove the FDIC as receiver, return control of United Western to the plaintiffs, reimburse the plaintiffs for their costs and attorney fees, and to award plaintiffs other relief as may be just and equitable. Neither BancShares nor FCB was named in the complaint. The defendants filed motions to dismiss all claims against them and, during June 2011, the Court dismissed all claims by the holding company and the individual directors, and it dismissed United Western Bank’s claim against the FDIC. However, the Court denied the motion to dismiss United Western Bank’s claim against the OTS, which permits that claim to proceed. It is unclear what impact, if any, the litigation will have on FCB or the assets acquired in the United Western transaction.

During March 2012, FCB received communications from the US Small Business Administration (SBA) asserting that the SBA is entitled to receive a share of amounts paid or to be paid by the FDIC to FCB relating to certain specific SBA-guaranteed loans pursuant to the loss share agreement between FCB and the FDIC applicable to Temecula Valley Bank. FCB disputes the validity of the SBA claims and is pursuing administrative relief through the SBA. FCB is unable to determine the outcome or range of loss, if any, related to these claims.

FCB previously reported that it had identified issues in its compliance with certain Treasury Regulations governing the provision of information returns to customers relating to debt presumed to have been forgiven for tax purposes. FCB has resolved the matter with the Internal Revenue Service. The resolution did not involve any payment to the IRS.